Update app.py

app.py

@@ -69,6 +69,28 @@ def safe_get(url: str, timeout: int = 15):
     r.raise_for_status()
     return r
 
+def _temp_file(data: bytes, suffix: str) -> str:
+    """
+    Write *data* to a temporary file and return its absolute path.
+
+    Parameters
+    ----------
+    data: bytes
+        The binary content to store.
+    suffix: str
+        File extension **including** the leading dot (".jpg", ".mp4", …).
+
+    Returns
+    -------
+    str
+        Path to the created temporary file.
+    """
+    fd, path = tempfile.mkstemp(suffix=suffix)
+    os.close(fd)                     # close low‑level descriptor
+    with open(path, "wb") as f:
+        f.write(data)
+    return path
+
 def fetch_bytes(src: str, stream_threshold: int = STREAM_THRESHOLD, timeout: int = 60, progress=None) -> bytes:
     if progress is not None:
         progress(0.05, desc="Checking remote/local source...")